Red Star RC LaGG-3 User manual

Brand: Red Star RC

Model: LaGG-3

Type: User manual

Red Star RC LaGG-3 is a sport scale model kit designed using 3D computer engineering and interlocking construction design to help you build a straight lightweight model. Its low wing loading and built-in washout make this model a good flying plane. With a wingspan of 66 inches, a wing area of 980 square inches, and a weight of 9.5 – 10.5 lbs, this model is suitable for intermediate builders and pilots. The kit includes computer-drawn plan sheets, an illustrated instruction manual, laser-cut balsa and plywood parts sheets, a clear canopy, and a fiberglass cowl.

LaGG-3

Instruction Manual

Wingspan: 66 in. (1676 mm.)

Wing Area: 980 sq. in. (63.23 dm2)

Weight: 9.5 – 10.5 lbs (4082g – 4536 g)

Length: 59 in. (1473 mm.)

Wing Loading: 22- 24.5 oz per sq ft

(64.6-71.8 g per dm2) 308 Belltown Road, Owings Mills, MD 21117-3239

www.redstarrc.com

red_star_rc@yahoo.com

Thank you for purchasing Red Star RC LaGG-3 sport scale model Kit. This kit has been designed using 3D

computer engineering and interlocking construction design help you to build straight lightweight model. Low

wing loading and built in washout make this model a good flying plane. Please keep in mind that this kit is

intended for intermediate builder and intermediate pilot. If you do not meet these criteria, it is recommended to

seek help from a more experienced builder / pilot.

Good luck!

Mike & George.

Red Star RC, BALTIMORE, MARYLAND, USA

[email protected]

WARRANTY…..Red Star RC guarantees this kit to be free from defects in both material and

workmanship at the date of purchase. This warranty does not cover any component parts damaged by use or

modification. In no case shall Red Star RC’s liability exceed the original cost of the purchased kit. Further, Red

Star RC reserves the right to change or modify this warranty without notice.

In that Red Star RC has no control over the final assembly or material used for final assembly, no liability shall

be assumed nor accepted for any damage resulting from the use by the user of the final user-assembled product.

By the act of using the user–assembled product, the user accepts all resulting liability.

If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to

return this kit immediately in new and unused condition to the place of purchase.

Our deep appreciation to Bennie Broughton aka Oryx on www.rcscalebuilder.com for his time and

efforts he spent for deep aerodynamic analysis and recommendations for wing airfoil.

NOTES BEFORE BEGINNING CONSTRUCTION

• Read the instructions and the plan sheet prior to start any work.

• Do not remove the parts from sheets until required.

• Prior to gluing, test fit and match parts over the plan.

Kit Contents:

• Computer Drawn Plan Sheets 2

• Illustrated Instruction Manual 1

• Laser Cut Balsa and Plywood Parts Sheet 30

• Clear Canopy 1

• Fiberglass cowl 1

Additional Hardware (Required for completing kit):

6-32 Bolt-nut Set (4 bolts, 4 Flat Washers, 4 Lock Washers, 4 Blind Nuts) 1

Push rod (Du-Bro #230) Ailerons 1

E/Z Links (Du-Bro #855) Ailerons 1

E/Z Connectors (Du-Bro #121) 1

Push Rods Sullivan Gold-n-Rod 1

Mechanical Retracts .60 - .90 size 85 degrees 1

Du-Bro Nylon Large Straps 5/32"(4) Landing Gear Covers 1

Wheel Axels 2

Wheel Collars 2

Wheels 4” 2

Robart 121 Scale Retractable Tail wheel 1

Tail Wheel 1.75” 1

Fuel Tank 12 oz 1

Spinner 4.25” (Dave Brown Vortech Standard S242-8242 & XX-long adapter nut) 1

Engine OS-.91FX 1

Muffler 1

Prop Master Airscrew 14x6 1

Robart 3/16" Super Point Hinges 23

Recommended Finishing Items:

MonoKote (Sky Blue 20206) 2

MonoKote (Gray/Green 20211/20214) 2

LustreKote Spray Paint 2

LustreKote Spray Flat Clear 2

Radio Gear:

7-channels receiver (9-channels recommended) 1

6” Servo Extension 2

12” Servo Extension 2

6” Y-servo Extensions 1

Standard Servos 8

Items You May Need:

Thin and Medium CA

30-min Epoxy

Wax Paper or Plastic Wrap

Razor Blades

Different Grid Sand Paper

Balsa Wood Filler

Windex

Isopropyl Alcohol

Build the Stab & Elevator

Unroll the plan sheets. Put them on your building

board and cover with wax paper so glue will not

adhere.

1. Locate and carefully remove Elevator parts from

balsa sheets. Test fit and sand them if necessary.

Assemble using plan as a reference.

2. Glue precut leading edge ELE.

3. Glue precut tips EET and end blocks EEB.

4. Glue balsa reinforcing edges and sand to shape.

Glue precut hinge blocks EHB.

5. Shape leading edge round.

6. Put stab ribs over the plan and fix them into

position.

7. Glue central forward ply horizontal reinforcing

stringer, rear reinforcing stringer, subleadning

edges. Glue subtrailing edge and subtrailing edge

doubler. Lightly sand it to prepare for sheeting.

8. Glue hinge blocks according to the plan using

balsa leftovers. Prepare sheeting by gluing three

1/16”x4”x19.5” sheets together along longer side.

Then cut it by half. Sheet top of the stub. Remove

from building board and sheet bottom.

9. Glue precut stub tips HST together.

10. Glue tips to the stub. Glue centering piece HS-

CP in front of the stab.

11. Glue precut leading edges HS-LE to the

stub. Build the Fin & Rudder

1. Glue two rudder halves RF1-1 and RF1-2

together.

2. Glue two leading edges RLE together. Glue

ribs and resulting leading edge to rudder core.

3. Glue rudder bottom tips RBT together by pairs

and glue them in place in the bottom of the rudder.

3. Glue hinge blocks and control horn support

block from balsa leftovers according to the plan.

Make sure they are lower than ribs.

4. Shape leading edge round.

5. Glue ribs VS1-1(goes up top) and VS1-2

together. Place Vertical stab ribs over the plan. Glue

subleading VSSLE and subtrailing VSSTE edges.

6. Sheet top of the stab. Remove it from building

board.

7. Glue hinge block and shape it.

8. Sheet Vertical stab from the other side. Glue

together two halves of stab tip VST and glue tip

in place.

Build the fuselage

1. Locate and assemble top fuse formers.

Attention! All formers installed with markings

facing forward (toward nose).

2. Locate and assemble nose parts. Glue

stringers together according to the plan.

3. Assemble fuse nose part over the plan.

4. Glue two 1/8x1/4x24” side bass stringers

together. Make two of them

5. Put them over the plan and form using t-pins.

Join them with nose part.

6. Glue top formers according to the plan.

Control vertical using square.

7. Install horizontal stab saddle SS. Install top

horizontal substringer FT1. Install stringers.

8. Glue sheeting support doublers SSD. Install

vertical stab.

9. Install canopy rear window former W.

10. Shape top substringer.

11. Sheet the fuselage with 1/16” balsa sheets. Do

not sheet tail yet. We need an access to the pushrods

installation.

12. Glue precut top stringer FT-2. Now it’s time to

remove fuselage from the building board.

13. Build the motor box. Make sure everything

strait and true. Fuelproof forward part from the

outside using 30 min epoxy tinned with isopropyl

alcohol. It will be hard to access it once installed in

the fuselage.

14. Glue two firewall 1/8” light ply and one 1/16”

burch ply formers. Attach motor mount aligning it

using the reference lines.

15. Install blind nuts and secure them with CA.

16. Glue reinforcing triangles and install firewall

using 30 min. epoxy.

17. Build retractable tail wheel former from F19-B,

F20 and two TW’s.

18. Glue servo tray doublers F-STD to servo

tray F-ST. Install servo tray into the fuselage.

19. Install motor box and remaining formers in the

fuselage. When installing former F21 you may need

to unglue two side bass stringers from the last

former VSSTE-T. Install Wing Support formers

WS1 and WS2.

20. Install remaining stringers according to the plan.

21. Install wing support plate WSP and bolts

doublers WSP-D underneath the plate.

22. Install two rudder hinge blocks using balsa

leftovers.

23. Install pushrods according to the plan and glue

them to the formers.

24. Build the fuselage part of air scoop from former

AS4 and stringers ASS-2 and ASS-3.

25. Glue precut sheeting support WSS to wing

saddle doublers and sand them into shape.

26. Sheet bottom of the fuselage except tail.

27. Install retractable tail wheel. Connect pull-pull

cable. Sheet tail part of the fuselage.

28. Install pushrod support from both ends from

balsa leftovers.

29. Install push rod end blocks from both sides.

30. Make elevator joint according to the plan from

3/32” rod.

31. Drill elevator halves according to the plan and

test fit joint. Hinge elevator and horizontal stab.

32. Install pushrod with precut supported former

EPSS.

33. Install horizontal stab. Glue sheeting support

from both sides.

34. Sheet top. Glue precut vertical stab leading

edge. Glue balsa block from balsa leftovers between

vertical stab and top to form fairing later.

35. Sand fuselage to shape.

36. Glue tail block and sand it to shape. Glue

vertical stab doubler VSTE.

37. Hinge rudder and install precut control horn.

38. Glue small triangle from balsa leftover to

horizontal stab and sand it to shape. Do the same for

another side.

Build the Ailerons

1. Glue two aileron tips together.

2. Glue ribs according to the plans. Glue aileron

tips. Double tip goes to the bottom. Remember that

the other aileron is a mirror copy of this one. Do not

build two identical ailerons!!!

3. Glue 1/8” end doublers AR-1D and AL-1D.

4. Glue precut leading edge.

5. Glue precut 1/4” balsa hinge blocks (by pairs

from each side). Make sure they are lower than ribs.

Sand them if necessary. Do not round leading edge

yet.

Build the Wing

1. Glue wing rib doublers with 30min epoxy. Pay

attention on left/right position of the doublers!

2. Glue landing gears former doublers with 30min

epoxy.

3. Make landing gear assembly with 30min epoxy.

4. Cut 1/2”x 1/4” central wing section bass stringers

according to the picture (6.5” and 2.5”). They will

also be a retract servo tray.

5. Glue Top and Bottom wing bolt support blocks

WBB. Top – WBB-1, WBB-2, WBB-3. Bottom –

WBB-1, WBB-2, WBB-3, WBB-4

6. Glue central rib doublers R1-D. Make right and

left of them.

7. Glue flap servo doublers WFSD. They go on

the opposite side than R4-B doubler! Make right

and left ribs!

8. Glue aileron rib doubler. Make right and left

of them!

9. Assemble central wing section according to the

plan.

10. Assemble subleading edge from WSLE-1 &

WSLE-2

11. Assemble right wing on building board

according to the plan. Glue aileron doubler.

12. Note flap and aileron trailing edge joint.

13. Sand the wing preparing it for sheeting.

14. Install shear web from 3/32 (1/16) leftovers. The

last one goes from the other side in order that not to

interfere with servo tray.

15. Prepare four sheathings from 1/16” balsa sheets

according to the templates provided.

16. Install top Wing Bolt Support Block WBB

and sand it to shape.

17. Sheet top of the wing. Live a space for flap

sheeting on trailing edge

18. Build and sheet left wing the same way you

built the right one

19. Put flap base on building board. Glue ribs

according to the plan.

20. Glue additional R8 doubler on place according

to the plan (goes from the narrow side!). Remember

to build right and left flaps!

21. Sand the edge of the flap at the rib angle

22. Sheet flap leading edge and top. Sand to shape.

23. Mount flap servos.

24. Glue balsa 1/4” leftovers to flap and aileron

servo cover bases.

25. Glue them in place.

26. Build wheel well from 1/16” balsa leftovers

and send them to shape.

27. Glue Landing gear shim from ply leftovers,

sheeting support around from balsa and sand to

shape.

28. Install retract servo, pushrods, retracts and

test them for smooth operation.

29. Install hinge blocks according to the plan.

30. Mark hinge location and then hinge flaps.

31. Glue precut control horn in place.

32. Connect pushrod to test fit flap function.

33. Prepare wing flap top sheeting from precut

1/16” balsa sheet and 1” wide strip sandwich from

1/32” balsa and 1/32” ply according to the templates

provided.

34. Sheet top of the wing flap area with ply

reinforcing strip facing inside out.

35. Glue bottom wing bolt support blocks and

sand them to shape.

36. Make four servo mounting blocks. Glue support

blocks to servo covers and mount servos.

37. Sand the wing and sheet wing bottom. Cut

servo openings.

38. Cut landing gear openings.

39. Cut central section of trailing edge according to

the plan. Install central section trailing edge

sheeting support blocks from 1/4” and 1/8” balsa

leftovers, shape them and sheet the central section.

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Red Star RC LaGG-3 User manual

Brand: Red Star RC

Model: LaGG-3

Type: User manual

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Red Star RC LaGG-3 User manual

Red Star RC LaGG-3 User manual

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